Lasers writing

A high quahty version of a dye-sublimation printer has been developed specifically for color proofing. This device uses a laser writing head, rather than the typical thermal printhead, to produce higher resolution images. The device is capable of tme halftones, providing an accurate rendition of a printed page. It is, however, expensive both in equipment and materials cost. 

Current study in this area is prompted by laser-induced CVD of such volatile gold compounds, permitting direct laser writing in gold [155]. 

Write laser Write laser Read laser... 

Optical recording material with Laser-writing and Laser-reading capabilities consists of the metal complex 48 [91 JAP(K)0313384]. 

Figure 8. Perylenedicar-boximide derivative 55 has a high practical potential for laser writing on plastics. Upon heating the alkoxycar-bonyl groups are cleaved and 56 is yielded. This reaction is accompanied by an eye-catching color change. The UV-VIS spectra are recorded from a polystyrene film containing 55 before and after heat exposure.

Direct Laser Writing with Ultra-High Resolution. 198... 

Fig. 2 SEM images of non-interlaced (a L) spiral structures recorded by direct laser writing in SU-8 [11] and their transmission/reflection spectra. Upper row spirals with lateral period a = 3.0 p.m, arm length L = 2.7 p.m, vertical spiral pitch c = 4.32 p.m, structure volume 16 X 16 X 8 spiral periods. (Lower row a = 0.95 p.m, L = 0.7 p.m, c = 1.484 jjim,...

Seet KK, Jarutis V, Juodkazis S, Misawa H (2005) Nanofabrication by direct laser writing and holography (invited paper). Proc SPIE Int Soc Opt Eng 6050(60500S) l-9... 

Deubel M, von Freymann G, Wegener M, Pereira S, Busch K, Soukoulis CM (2004) Direct laser writing of three-dimensional photonic-crystal templates for telecommunications. Nat Mater 3 444-447... 

Seet KK, Mizeikis V, Matsuo S, Juodkazis S, Misawa H (2005) Three-dimensional spiral - architecture photonic crystals obtained by direct laser writing. Adv Mat 17(5) 541-545. doi 10.1002/adma.200401527... 

Three-Dimensional Structuring of Resists and Resins by Direct Laser Writing and Holographic Recording... 

Third, the line can become unstable during laser writing, and instead of a single line, a periodic pattern of discrete deposits is obtained (233-235). This pattern is analogous to bifurcations in other spatially distributed systems, such as catalytic fixed-bed reactors, and can be analyzed in the same manner (235). 

Several transparent electrode materials were tried, including indium-tin oxide, or 5-nm-thick layers of Cr or Nb. Although the thin-metal films have an optical density of 0.2 - 0.3, they produce less debris on the surface during laser writing. The opposite electrode was typically a 20-30-nm-thick film of Cr or Nb deposited by evaporation or ion-beam deposition, respectively. For test purposes, this layer was patterned with a shadow mask in 3.5-mm-diameter circles that could be connected independently to the voltage source. 

Figure 7.7. Effect of recording layer thickness on performance for a dye-polymer layer. The recording was done at 488 nm the phase readout was done at 633 nm. The abbreviations SNR and IWL denote the signal-to-noise ratio and the laser write layer, respectively. Reproduced with permission from reference 15. Copyright 1981 American Institute of Physics.)...

A. After the laser writes the image to a photosensitive drum, the transfer corona wire charges the paper so that the toner is pulled from the drum to the paper. See Chapter 7 for more information. 

Reduction of GO provides a promising way for large scale production of graphene. Many methods have been used for the reduction process, such as chemical reduction [9-11], thermal reduction [12, 13], flash reduction [14], electrochemical reduction [15], photocatalytic reduction [16, 17], and direct laser-writing [18]. 

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